FiT238, a professional/official used alcohol testing instrument. Using the electrochemical reaction for platinum vs ethanol molecules, gives the most stable and reliable measuring technology (fuel cell sensor). Latest oled color display gives the most user friendless interface. 1. Display:: four color oled,96*64dots. 2. Keyboard::5 keys, up, down, left, right, ok 3. Power supply:: Built-in rechargeable battery; DC 12v(10-16v) from controller unit 4. Heat warm up:: Chamber & sensor warm up automatically 5.: Operation condition -40 degree c to +85 degree c. 6.: PC download for IBM compatible PC (through rs-232 cable,9600bps-optional) 7.: Data log with real time clock (rtc) 8.: Instructing LED for indication 9. Accuracy:: +/-0.01%bac 10.: Suck feature for anti-cheat test 11: S&e, CE, as, nf&dot approval